It was my Life class again today and we're having a two week pose so decided to work slightly bigger and in charcoal for a change.  Put down a middle tone using my charcoal sock (a pair of tights with charcoal powder in it!) and then worked into that tone with my eraser and willow charcoal.  Relatively happy with my drawing so next week I can concentrate on my form in the body and building up the strength in the darker areas.